Add ImageMagick PHP extension to support "Theming of icons"

[suntorytimed]

The current docker image doesn't provide the dependencies for "Theming of icons":

https://docs.nextcloud.com/server/13/admin_manual/configuration_server/theming.html#theming-of-icons

Please add the ImageMagick PHP extension and ImageMagick SVG support to the container to support custom favicons in settings/admin/theming of Nextcloud.

[phlegx]

Here our Dockerfile code to add Imagemagick.

FROM nextcloud:13.0.1-fpm

RUN apt-get update; \
    apt-get install -y --no-install-recommends \
        sudo \
        libmagickwand-dev \
        libmagickcore-extra \
    ; \
    pecl install imagick; \
    docker-php-ext-enable imagick; \
    apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
    rm -rf /var/lib/apt/lists/*

[suntorytimed]

Don't forget to cleanup the dpkg cache after the installation of the packages.

[phlegx]

@suntorytimed please add the cleanup Dockerfile code. Did you mean this, like in the Nextcloud Dockerfile?

RUN apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
    rm -rf /var/lib/apt/lists/*

[suntorytimed]

@phlegx yes, something like this. It should be part of the RUN command that executes apt-get. You could also add

apt-get clean

Docker provides some best practices (https://docs.docker.com/develop/develop-images/dockerfile_best-practices/) They state that it is not necessary to run apt-get clean, because the official image does this already, but I do it anyways just to be safe.

I also tend to split my commands in several RUNs so more snapshots are created and can be reused. I would also avoid installing sudo if you don't need it for specific tasks:

FROM nextcloud:13.0.1-fpm

RUN apt-get update && \
    apt-get install -y --no-install-recommends \
        libmagickwand-dev \
        libmagickcore-extra \
        && apt-get clean \
        && rm -rf /var/lib/apt/lists/*
RUN pecl install imagick
RUN docker-php-ext-enable imagick

EDIT: And instead of ; use && to separate your commands. This way the next command will only be executed if the previous one was successful.

[seblu]

What could make this be added to official images? Do you expect a merge request?

[lupa18]

Hello, I'm getting this error:

E: Package 'libmagickcore-extra' has no installation candidate

[rubo77]

maybe try libmagickcore-6.q16-3-extra or libmagickcore-6.q16hdri-3-extra instead?

Or maybe it is not needed at all. in the full dockerfile example it is not listed either.

[lupa18]

@rubo77 work with libmagickcore-6.q16-3-extra

thanks!

[rubo77]

What is the extra package for?

Should we add it to the "full" docker file?

[lupa18]

As I can understand, this package is a dependence for compiling imagick's php extension: docker-php-ext-enable imagick